1．The professor came into the lecture hall，____________ (陪伴)by some assistants.
2．His newly bought mobile phone is equipped with two ____________ (电池)，which may save a lot of time.
3．Gas is one of the modern ________ (便利)the newly built apartment building provides.
4. His busy work didn’t prevent him from going to see his colleagues before the Spring Festival____________(亲自)．
5．As middle school students，you should make your plans for studies with ____________ (谨慎)，otherwise a lot of time would be wasted.
6．I didn’t know the fact that the recorder player used to be w____________by hand until I learned the history of TV and audio devices.
7．To the d____________of his parents，he has made a full recovery.
